51. Of what importance are the labyrinth senses (other than hearing) to man and various animals? 52. What is meant by organic sensations? 53. What are the four tastes? 54. How does the sense of smell in man compare with that of animals? 55. Why is the color pyramid superior to the color cone? 56. What are the chief symptoms of defective color vision? 57. What is not meant, and what is meant, by color mixtures? 58. Why does music use only twelve tones? 59. What is meant by the qualities of the tones of various instruments? 60. Are there any limits to the analyzing power of the ear? 61. What is the exact number of classes of sensations? 62. How does the sensory equipment of man compare with that of the animals? 63. What do we learn from experiments on blind-born persons who have been operated on? 64. In what experiences is time an attribute of sense perception? 65. Is tone relationship a property of sense or of thought? 66. Can you illustrate the absolute sensitivity of our sense organs? 67. How does the range of applicability of our sense organs compare with that of tools and instruments? 68. Can you illustrate Weber’s law? 69. What are the practical advantages obtained through Weber’s law? 70. Illustrate sensitiveness to change and movement. 71. How is the chief difference in the behavior of chickens and bats to be explained? § 5. IMAGINATION Mind is influenced not only by that which is present, but also by the past and--one may say--the future, and by that which exists at another place. Consciousness of this kind is called imagery. I imagine a lion and recognize that he looks different from a horse. I recall the room in a hotel where I have recently spent a night and see that it differs from my study.